JP2001023427A - Discharge lamp device and headlamp for vehicle - Google Patents
Discharge lamp device and headlamp for vehicleInfo
- Publication number
- JP2001023427A JP2001023427A JP11195992A JP19599299A JP2001023427A JP 2001023427 A JP2001023427 A JP 2001023427A JP 11195992 A JP11195992 A JP 11195992A JP 19599299 A JP19599299 A JP 19599299A JP 2001023427 A JP2001023427 A JP 2001023427A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- tube
- discharge
- base
- lamp device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車等の車両の
前照などに用いられる放電灯装置及びこの放電灯装置を
具備した車両用前照灯に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp device used for a headlight of a vehicle such as an automobile, and a vehicle headlight provided with the discharge lamp device.
【０００２】[0002]
【従来の技術】図７乃至図１１に先行技術の放電灯装置
を示す。図中に符号９０で示すものは放電灯装置で、口
金９１と放電灯９２から構成されている。放電灯９２は
発光管９３と発光管９３を密封する透明ガラスの外管９
４とから構成されている。発光管９３の代表的なものと
して、高圧放電ランプの一つであるメタルハライドラン
プがあり、これを図１１に示す。図１１において、発光
管９３は石英ガラス管で成形され、内部に放電空間９５
を有し、放電空間９５に一端を突出するように埋設され
たタングステンなどの高融点金属からなる一対の電極９
６を備え、電極９６の放電空間９５と反対の端にはモリ
ブデンなどからなる金属箔９７を溶接などの手段で連接
し、さらに，金属箔９７の放電空間９５と反対側の端に
は給電用のリードワイヤ９８を溶接などの手段で連接
し、放電空間９５内への突出部分を除く電極９６からリ
ードワイヤ９８のある部分までをピンチシールなどの手
法で石英ガラス内に埋め込むことにより、金属箔９７の
周囲で気密封止が成されるとともにリードワイヤ９８か
ら電極９６への電気伝導を成している。2. Description of the Related Art FIGS. 7 to 11 show a prior art discharge lamp device. Reference numeral 90 in the figure denotes a discharge lamp device, which comprises a base 91 and a discharge lamp 92. The discharge lamp 92 has an arc tube 93 and a transparent glass outer tube 9 for sealing the arc tube 93.
And 4. A typical example of the arc tube 93 is a metal halide lamp, which is one of high-pressure discharge lamps, and is shown in FIG. In FIG. 11, the arc tube 93 is formed of a quartz glass tube and has a discharge space 95 therein.
And a pair of electrodes 9 made of a high melting point metal such as tungsten, which is embedded in the discharge space 95 so as to protrude one end.
6, a metal foil 97 made of molybdenum or the like is connected to an end of the electrode 96 opposite to the discharge space 95 by welding or the like. Lead wires 98 are connected by means of welding or the like, and a portion from the electrode 96 excluding a protruding portion into the discharge space 95 to a portion of the lead wire 98 is embedded in quartz glass by a technique such as pinch sealing, so that a metal foil is formed. A hermetic seal is formed around the periphery 97 and electric conduction from the lead wire 98 to the electrode 96 is achieved.
【０００３】図７乃至図１１において、口金９１は、取
り付け基準面となるフランジ１００を形成した外径部９
９を一方の面に有した有底形状をし、外径部９９の内方
に外径部９９と間隔を保って放電灯９２の挿入部となる
筒状の内径部１０１を有する。放電灯９２は、その一端
を口金９１の内径部１０１内に外管９４が比較的密着状
態に挿入されて保持され、この状態で放電灯９２の両端
から延出したリードワイヤ９８に接続されて口金９１か
ら延出した端子１０２に通電されるように給電ラインが
接続される。また、リードワイヤ９８には、絶縁を確保
するため碍子９８ａを被着している。１０３は放電灯９
２の両端から延出したリードワイヤ９８相互間の絶縁距
離を長くするために口金９１に設けた電気絶縁材であ
る。１０４は放電灯９２から発する光の一部を遮るよう
に外管９４に塗布した黒色の遮光部（ブラックストライ
プ）で、放電灯９２の取り付け状態に応じてその塗布の
場所が決定される。図の場合は、放電灯装置９０を自動
車の前照灯として用いた場合のブラックストライプの形
状を示しており、１０４ａが下方への照射光の一部を遮
って放電灯９２から発する光の照射範囲を定めるための
基準となる。このため、照射光の一部を遮るために放電
灯９２の下面を覆うように取り付けられるフードの取り
付け位置が１０４ａを基準として定められる。１０４ｂ
は、ピンチシールにて金属箔９７部分の発光管９３に生
じた凹凸部分からの拡散光を遮るためのブラックストラ
イプである。In FIGS. 7 to 11, a base 91 has an outer diameter portion 9 on which a flange 100 serving as a reference mounting surface is formed.
9 has a bottomed shape having one surface on one side, and has a cylindrical inner diameter portion 101 inside the outer diameter portion 99 to be an insertion portion of the discharge lamp 92 at an interval from the outer diameter portion 99. One end of the discharge lamp 92 is inserted into and held in the inner diameter portion 101 of the base 91 in a relatively tight state, and is connected to lead wires 98 extending from both ends of the discharge lamp 92 in this state. A power supply line is connected so that power is supplied to the terminal 102 extending from the base 91. Further, an insulator 98a is attached to the lead wire 98 to ensure insulation. 103 is a discharge lamp 9
2 is an electrical insulating material provided on the base 91 in order to increase the insulation distance between the lead wires 98 extending from both ends. Reference numeral 104 denotes a black light-shielding portion (black stripe) applied to the outer tube 94 so as to block a part of the light emitted from the discharge lamp 92, and the application location is determined according to the mounting state of the discharge lamp 92. In the case of the figure, the shape of a black stripe when the discharge lamp device 90 is used as a headlight of an automobile is shown, and irradiation of light emitted from the discharge lamp 92 is performed by blocking a part of irradiation light 104a downward. It serves as a reference for determining the range. For this reason, the mounting position of the hood which is mounted so as to cover the lower surface of the discharge lamp 92 to block a part of the irradiation light is determined with reference to 104a. 104b
Is a black stripe for blocking diffused light from uneven portions generated in the arc tube 93 of the metal foil 97 by a pinch seal.
【０００４】図７は放電灯装置９０の分解斜視図、図８
は口金９１と放電灯９２との組合わせ状態の斜視図、図
９は口金９１と放電灯９２との組合わせ状態の側面図、
図１０は口金９１の正面図、図１１は発光管９３の断面
図である。FIG. 7 is an exploded perspective view of a discharge lamp device 90, and FIG.
9 is a perspective view of a combination state of the base 91 and the discharge lamp 92, FIG. 9 is a side view of a combination state of the base 91 and the discharge lamp 92,
FIG. 10 is a front view of the base 91, and FIG. 11 is a sectional view of the arc tube 93.
【０００５】また、メタルハライド放電灯を光源とした
従来の車両用前照灯の一つが特開平１０−５５７０５号
に開示されている。これは、ひとつの光源を水平軸上に
配置し、この光源の放射光を収束させるための反射鏡、
走行ビーム配光とすれ違いビーム配光とを切り換えるイ
ンナーレンズ、インナーレンズを支持軸に対して回動さ
せるための駆動装置、反射鏡から反射された光を前方に
透過するアウターレンズから構成されている。[0005] One of the conventional vehicle headlamps using a metal halide discharge lamp as a light source is disclosed in Japanese Patent Application Laid-Open No. H10-55705. This is a reflector that arranges one light source on the horizontal axis and converges the emitted light of this light source,
It is composed of an inner lens that switches between the running beam distribution and the passing beam distribution, a driving device that rotates the inner lens with respect to the support shaft, and an outer lens that transmits the light reflected from the reflector forward. .
【０００６】このような従来の放電灯装置及び車両用前
照灯において、口金９１は合成樹脂（プラスチック）で
成形されたものが用いられている。この場合、合成樹脂
材料として一般的にポリフェニレンサルファイド（ＰＰ
Ｓ）が多く用いられる。In such a conventional discharge lamp device and vehicle headlamp, the base 91 is formed of a synthetic resin (plastic). In this case, polyphenylene sulfide (PP) is generally used as a synthetic resin material.
S) is often used.
【０００７】[0007]
【発明が解決しようとする課題】このような従来の放電
灯装置及び車両用前照灯において、放電灯９２の外管９
４に塗布されているブラックストライプは、照射範囲を
規定するために設けられ、特に自動車の前照灯の場合に
は、規制された適正な照射が行われるように、特定のパ
ターンで設けられたものである。このため、放電灯９２
が点灯すると、そのときの熱や紫外線が口金９１の特に
内径部１０１に与えられ、この部分のＰＰＳが劣化す
る。即ち、熱や紫外線によって口金９１の特に内径部１
０１のＰＰＳが、分解ガス昇華してこれが放電灯９２の
周辺部へ付着して白化（汚れ）を生じる。特に自動車の
前照灯に用いた場合には、前照灯の反射鏡の反射面など
に付着して白化（汚れ）を生じ、反射効率の低下や配光
特性に変化を与える原因となる。このような現象は、外
管９４に石英ガラスを使用して、これに紫外線カット用
として二酸化チタン（ＴｉＯ２）などを含有させても合
成樹脂製の口金９１に対しては不十分である。In such a conventional discharge lamp device and a vehicle headlamp, the outer tube 9 of the discharge lamp 92 is provided.
The black stripes applied to No. 4 are provided to define an irradiation range, and in particular, in the case of a headlight of an automobile, are provided in a specific pattern so that regulated and appropriate irradiation is performed. Things. Therefore, the discharge lamp 92
When is turned on, the heat and ultraviolet rays at that time are given to the inner diameter portion 101 of the base 91, and the PPS in this portion is deteriorated. That is, the inner diameter portion 1 of the base 91 is particularly heated by heat or ultraviolet rays.
01 PPS decomposes into sublimation gas, which adheres to the periphery of the discharge lamp 92 to cause whitening (dirt). In particular, when used in a headlight of an automobile, it adheres to a reflection surface of a reflector of the headlight and causes whitening (dirt), which causes a reduction in reflection efficiency and a change in light distribution characteristics. Such a phenomenon is not sufficient for the synthetic resin base 91 even if quartz glass is used for the outer tube 94 and titanium dioxide (TiO2) or the like is included in the outer tube 94 for cutting off ultraviolet rays.
【０００８】[0008]
【課題を解決するための手段】本発明は、前記の課題を
解決するための具体的な手段として、第１の発明は、石
英ガラス管の内部に放電空間と前記放電空間に一端を突
出するように埋設された一対の電極を有し前記電極への
給電用のリードワイヤを両端部から延出した発光管を外
管で覆った放電灯と、前記リードワイヤへ給電可能に前
記放電管の一端部を挿入部に支持した合成樹脂製口金と
からなる放電灯装置であって、前記放電灯からの光の照
射範囲を定めるよう前記外管に設けた黒色の遮光部を前
記口金に挿入される側の前記外管の根本部分にまで形成
し、前記発光管からの光による前記挿入部の劣化抑制を
することを特徴とする放電灯装置を提供するものであ
る。According to the present invention, as a specific means for solving the above-mentioned problems, a first invention is directed to a discharge space inside a quartz glass tube and one end protruding into the discharge space. A discharge lamp having a pair of electrodes buried as described above and having a light emitting tube extending from both ends and having a lead wire for supplying power to the electrodes covered with an outer tube, and a discharge lamp capable of supplying power to the lead wire. A discharge lamp device comprising a synthetic resin base having one end supported by an insertion portion, wherein a black light-shielding portion provided on the outer tube is inserted into the base so as to define an irradiation range of light from the discharge lamp. A discharge lamp device which is formed up to a root portion of the outer tube on the side of the discharge lamp, and suppresses deterioration of the insertion portion due to light from the arc tube.
【０００９】第２の発明は、石英ガラス管の内部に放電
空間と前記放電空間に一端を突出するように埋設された
一対の電極を有し前記電極への給電用のリードワイヤを
両端部から延出した発光管を外管で覆った放電灯と、前
記リードワイヤへ給電可能に前記放電管の一端部を挿入
支持する内径部を有した合成樹脂製口金とからなる放電
灯装置であって、前記内径部にはその内面を覆って前記
発光管から前記内径部へ照射される光を遮ぎる金属性の
劣化防止用筒を設けたことを特徴とする放電灯装置を提
供するものである。According to a second aspect of the present invention, there is provided a quartz glass tube having a discharge space and a pair of electrodes embedded so as to protrude one end into the discharge space, and a lead wire for supplying power to the electrode is provided from both ends. A discharge lamp device comprising: a discharge lamp in which an extended arc tube is covered with an outer tube; and a synthetic resin base having an inner diameter portion that inserts and supports one end of the discharge tube so that power can be supplied to the lead wire. A discharge lamp device provided with a metal deterioration preventing tube for covering the inner surface of the inner diameter portion and blocking light emitted from the arc tube to the inner diameter portion. .
【００１０】第３の発明は、石英ガラス管の内部に放電
空間と前記放電空間に一端を突出するように埋設された
一対の電極を有し前記電極への給電用のリードワイヤを
両端部から延出した発光管を外管で覆った放電灯と、前
記リードワイヤへ給電可能に前記放電管の一端部を挿入
部に支持した合成樹脂製口金とからなる放電灯装置であ
って、前記口金の表面には前記発光管から前記口金へ照
射される紫外線を吸収する紫外線吸収層を設けたことを
特徴とする放電灯装置を提供するものである。According to a third aspect of the present invention, there is provided a quartz glass tube having a discharge space and a pair of electrodes embedded so as to protrude one end into the discharge space, and a lead wire for supplying power to the electrode is provided from both ends. A discharge lamp device comprising: a discharge lamp in which an extended arc tube is covered by an outer tube; and a synthetic resin base supporting one end of the discharge tube in an insertion portion so as to supply power to the lead wire, wherein the base is provided. A discharge lamp device provided with an ultraviolet absorbing layer for absorbing ultraviolet light emitted from the arc tube to the base.
【００１１】第４の発明は、石英ガラス管の内部に放電
空間と前記放電空間に一端を突出するように埋設された
一対の電極を有し前記電極への給電用のリードワイヤを
両端部から延出した発光管を外管で覆った放電灯と、前
記リードワイヤへ給電可能に前記放電管の一端部を内径
部に挿入支持した合成樹脂製口金とからなる放電灯装置
であって、前記内径部に挿入された前記外管の根本部分
にまで塗布した黒色の遮光部、前記内径部の内面を覆う
金属性の劣化防止用筒、または前記口金の表面に設けた
紫外線吸収層の何れかまたはこれらの複数の組み合わせ
からなることを特徴とする放電灯装置を提供するもので
ある。According to a fourth aspect of the present invention, there is provided a quartz glass tube having a discharge space and a pair of electrodes embedded so as to protrude one end into the discharge space. A discharge lamp device comprising: a discharge lamp in which an extended arc tube is covered with an outer tube; and a synthetic resin base in which one end of the discharge tube is inserted and supported in an inner diameter portion so that power can be supplied to the lead wire, Either a black light-shielding portion applied to the root portion of the outer tube inserted into the inner diameter portion, a metallic deterioration preventing cylinder covering the inner surface of the inner diameter portion, or an ultraviolet absorbing layer provided on the surface of the base. Another object of the present invention is to provide a discharge lamp device comprising a combination of a plurality of these.
【００１２】第５の発明は、石英ガラス管の内部に放電
空間と前記放電空間に一端を突出するように埋設された
一対の電極を有し前記電極への給電用のリードワイヤを
両端部から延出した発光管を外管で覆った放電管と、前
記リードワイヤへ給電可能に前記放電管の一端部を内径
部に挿入支持した合成樹脂製口金とからなる放電灯装置
であって、前記内径部に挿入された前記外管の根本部分
を覆う黒色の遮光部と、前記内径部の内面を覆うように
設けた劣化防止用筒とを一連の金属で構成したことを特
徴とする放電灯装置を提供するものである。According to a fifth aspect of the present invention, there is provided a quartz glass tube having a discharge space and a pair of electrodes embedded so as to protrude one end into the discharge space, and a lead wire for supplying power to the electrode is provided from both ends. A discharge lamp device comprising: a discharge tube in which an extended arc tube is covered with an outer tube; and a synthetic resin base in which one end of the discharge tube is inserted and supported in an inner diameter portion so as to be able to supply power to the lead wire, A discharge lamp, wherein a black light-shielding portion covering a root portion of the outer tube inserted into an inner diameter portion and a deterioration preventing tube provided to cover an inner surface of the inner diameter portion are formed of a series of metals. An apparatus is provided.
【００１３】第６の発明は、上記第１乃至第５の発明の
いずれかの放電灯装置を具備したことを特徴とする車両
用前照灯を提供するものである。According to a sixth aspect of the present invention, there is provided a vehicular headlamp comprising the discharge lamp device according to any one of the first to fifth aspects.
【００１４】[0014]
【発明の実施の形態】次に、本発明の実施の形態につい
て説明する。図１乃至図６は本発明に係る放電灯装置の
実施形態を示す。図１は放電灯装置の第１の実施形態を
示す分解斜視図、図２は放電灯装置の第２の実施形態を
示す分解斜視図、図３は放電灯装置の第３の実施形態に
係る口金への紫外線吸収層の塗布状態を示す斜視図、図
４は放電灯装置の第３の実施形態を示す分解斜視図、図
５は口金と放電灯との関係を示す断面図、図６は放電灯
装置を具備した車両用前照灯の断面図である。Next, an embodiment of the present invention will be described. 1 to 6 show an embodiment of a discharge lamp device according to the present invention. FIG. 1 is an exploded perspective view showing a first embodiment of a discharge lamp device, FIG. 2 is an exploded perspective view showing a second embodiment of the discharge lamp device, and FIG. 3 is related to a third embodiment of the discharge lamp device. FIG. 4 is a perspective view showing a state in which an ultraviolet absorbing layer is applied to a base, FIG. 4 is an exploded perspective view showing a third embodiment of a discharge lamp device, FIG. 5 is a sectional view showing the relationship between the base and the discharge lamp, and FIG. It is sectional drawing of the vehicle headlamp provided with the discharge lamp device.
【００１５】本発明の放電灯装置の放電灯と口金の構成
は、本発明の特徴部分以外は図７乃至図１１に示す構成
と同様である。The structures of the discharge lamp and the base of the discharge lamp device of the present invention are the same as those shown in FIGS. 7 to 11 except for the characteristic portions of the present invention.
【００１６】先ず、本発明の第１の実施形態を図１に基
づいて説明する。本発明の放電灯３において、外管５の
外面に塗装手段にて塗布されるブラックストライプ１５
の範囲は、上記従来のブラックストライプ１０４ｂに比
して極めて広く、口金２の内径部１２に挿入される部分
全体に亘って外管５の根本部分にまで塗布したブラック
ストライプ１５Ｃを設けたことである。ブラックストラ
イプ１５の内径部１２から露出する範囲は、前照灯とし
ての配光形状を考慮して必要最小限に留めることが好ま
しい。First, a first embodiment of the present invention will be described with reference to FIG. In the discharge lamp 3 of the present invention, a black stripe 15 applied to the outer surface of the outer tube 5 by a coating means.
Is extremely wide as compared with the conventional black stripe 104b, and the black stripe 15C applied to the root portion of the outer tube 5 is provided over the entire portion inserted into the inner diameter portion 12 of the base 2. is there. It is preferable that the range exposed from the inner diameter portion 12 of the black stripe 15 be minimized in consideration of the light distribution shape as a headlight.
【００１７】これによって、発光管４から口金２の内径
部１２へ照射される光は遮られ、内径部１２の劣化が抑
制され、従来のような反射鏡への白化現象も抑制され
る。また反射鏡等への白化現象による配光特性の変化も
抑制できる。As a result, the light emitted from the arc tube 4 to the inner diameter portion 12 of the base 2 is blocked, the deterioration of the inner diameter portion 12 is suppressed, and the whitening phenomenon of the conventional reflecting mirror is also suppressed. In addition, a change in light distribution characteristics due to a whitening phenomenon on a reflecting mirror or the like can be suppressed.
【００１８】本発明の第２の実施形態を図２に基づいて
説明する。２２は口金２の内径部１２の内周面のほぼ全
体を覆って、内径部１２にほぼ密着状態で挿入される金
属性の劣化防止用筒であり、材質は、鉄（Ｆｅ）系、ア
ルミニウム（Ａｌ）系、マグネシウム（Ｍｇ）系、合金
系等である。劣化防止用筒２２の口金２の内径部１２へ
の取り付けは、一端部周囲に延びたヒレ２１を内径部１
２の外面に折り曲げることにて取り付けられる。また劣
化防止用筒２２の口金２の内径部１２への取り付けは、
別の方法として、内径部１２へのカシメによる取り付
け、内径部１２へ圧入する所謂はめ殺しによる取り付け
等の機械的な手段による方法、内径部１２へ接着剤など
による科学的な手段による取り付け、又は口金２を成形
するときに内径部１２に劣化防止用筒２２がインサート
される成形手段による方法など、種種の方法にて取り付
けられる。放電灯３はその一端部が劣化防止用筒２２に
て覆われた状態で口金２の内径部１２内に挿入支持され
る。これによって、発光管４から口金２の内径部１２へ
照射される光は遮られ、内径部１２の劣化が抑制され、
従来のような反射鏡への白化現象も抑制される。劣化防
止用筒２２の内面にはシールド塗装の層を設けて、この
内面からの光の反射を防止している。A second embodiment of the present invention will be described with reference to FIG. Reference numeral 22 denotes a metallic deterioration prevention tube which covers almost the entire inner peripheral surface of the inner diameter portion 12 of the base 2 and is inserted into the inner diameter portion 12 in a substantially adhered state. The material is iron (Fe), aluminum or the like. (Al) -based, magnesium (Mg) -based, alloy-based, and the like. To attach the deterioration prevention cylinder 22 to the inner diameter portion 12 of the base 2, the fin 21 extending around one end portion is attached to the inner diameter portion 1.
It is attached by bending to the outer surface of No. 2. The attachment of the deterioration prevention cylinder 22 to the inner diameter portion 12 of the base 2 is performed as follows.
As another method, attachment to the inner diameter portion 12 by caulking, a method by mechanical means such as mounting by so-called press-fitting into the inner diameter portion 12, attachment to the inner diameter portion 12 by a scientific means such as an adhesive, or When the base 2 is formed, it is attached by various methods such as a method using molding means in which the deterioration preventing cylinder 22 is inserted into the inner diameter portion 12. The discharge lamp 3 is inserted and supported in the inner diameter portion 12 of the base 2 in a state where one end of the discharge lamp 3 is covered with the deterioration prevention tube 22. Thereby, light emitted from the arc tube 4 to the inner diameter portion 12 of the base 2 is blocked, and deterioration of the inner diameter portion 12 is suppressed,
The conventional whitening phenomenon on the reflecting mirror is also suppressed. A layer of shield coating is provided on the inner surface of the deterioration prevention cylinder 22 to prevent light from being reflected from the inner surface.
【００１９】本発明の第３の実施形態を図３及び図４に
基づいて説明する。この場合、放電灯３からの光の照射
を受ける口金２の表面、即ち、外径部１０と内径部１２
の内外面を、紫外線吸収層で覆う。その方法は、スプレ
ーガン２３による塗布、口金２を紫外線吸収材の液に浸
す所謂ディッピングによるコーティング、等種種の方法
にて達成できる。紫外線吸収層としては、アクリル系樹
脂、紫外線吸収剤入りの樹脂、ＰＣ（ポリカーボネート
樹脂）レンズのハードコート等適切な材料を選択する。
紫外線吸収層は口金２の内外両表面の全体に設ける方法
でもよい。これによって、口金２の内径部１２及び外径
部１０は発光管４から照射される光から保護され、口金
２の劣化が抑制され、従来のような反射鏡への白化減少
も抑制される。A third embodiment of the present invention will be described with reference to FIGS. In this case, the surface of the base 2 receiving the light irradiation from the discharge lamp 3, that is, the outer diameter portion 10 and the inner diameter portion 12
Is covered with an ultraviolet absorbing layer. The method can be achieved by various methods such as application by a spray gun 23, coating by so-called dipping in which the base 2 is immersed in a liquid of an ultraviolet absorber. As the ultraviolet absorbing layer, an appropriate material such as an acrylic resin, a resin containing an ultraviolet absorbing agent, and a hard coat of a PC (polycarbonate resin) lens is selected.
The ultraviolet absorbing layer may be provided on the entire inner and outer surfaces of the base 2. As a result, the inner diameter portion 12 and the outer diameter portion 10 of the base 2 are protected from the light emitted from the arc tube 4, the deterioration of the base 2 is suppressed, and the decrease in whitening to the reflector as in the related art is also suppressed.
【００２０】本発明の第４の実施形態として、上記第１
の実施形態と第２の実施形態とを組み合わせた手段があ
る。即ち、放電灯３の外管５の外面に塗布されるブラッ
クストライプ１５に代わって、ブラックストライプと同
様の作用をする遮光部１５を金属板で構成し、この金属
板で構成した遮光部１５と上記の劣化防止用筒２２とを
上記のような材質の一連の金属で構成することができ
る。これによって、発光管４から口金２の内径部１２へ
照射される光は遮られ、内径部１２の劣化が抑制され、
従来のような反射鏡への白化現象も抑制される。またブ
ラックストライプを外管５の外面に塗布にて形成した場
合と同様に、放電灯３から照射される光の配光範囲を規
定することもでき、同様の効果が得られる。As a fourth embodiment of the present invention, the first embodiment
There is a means that combines the second embodiment with the first embodiment. That is, instead of the black stripe 15 applied to the outer surface of the outer tube 5 of the discharge lamp 3, the light shielding unit 15 having the same function as the black stripe is formed of a metal plate. The above-mentioned deterioration preventing cylinder 22 can be made of a series of metals of the above-described materials. Thereby, light emitted from the arc tube 4 to the inner diameter portion 12 of the base 2 is blocked, and deterioration of the inner diameter portion 12 is suppressed,
The conventional whitening phenomenon on the reflecting mirror is also suppressed. Further, similarly to the case where the black stripe is formed on the outer surface of the outer tube 5 by coating, the light distribution range of the light emitted from the discharge lamp 3 can be defined, and the same effect can be obtained.
【００２１】本発明の第５の実施形態は、上記第１の実
施形態乃至第４の実施形態の単独又は複数の組み合わせ
によって達成できる。この場合も、上記第１の実施形態
乃至第４の実施形態において記載した作用効果が達成さ
れる。The fifth embodiment of the present invention can be achieved by a single or a combination of the first to fourth embodiments. Also in this case, the functions and effects described in the first to fourth embodiments are achieved.
【００２２】また本発明は、上記第１の実施形態乃至第
４の実施形態の単独の放電灯装置１、又は上記第１の実
施形態乃至第４の実施形態の複数を組み合わせた放電灯
装置１を図６のように取り付けた自動車等の車両用前照
灯として効果がある。この場合も、従来のような反射鏡
への白化現象も抑制され、反射効率の低下も抑制され、
車両の前照灯として良好な照射状態を維持できる。放電
灯３からの光の照射を受ける口金２の表面、即ち、外径
部１０と内径部１２の内外面を、紫外線吸収層で覆う。The present invention also relates to a single discharge lamp device 1 according to the first to fourth embodiments, or a discharge lamp device 1 combining a plurality of the first to fourth embodiments. Is effective as a headlamp for a vehicle such as an automobile, which is mounted as shown in FIG. Also in this case, the conventional whitening phenomenon on the reflecting mirror is suppressed, and a decrease in the reflection efficiency is also suppressed.
A good irradiation state can be maintained as a vehicle headlamp. The surface of the base 2 receiving the light irradiation from the discharge lamp 3, that is, the inner and outer surfaces of the outer diameter portion 10 and the inner diameter portion 12 is covered with an ultraviolet absorbing layer.
【００２３】また、本発明では、放電灯３からの光の照
射を受ける口金２の表面、即ち、外径部１０と内径部１
２の内外面、又は口金２の表面全体を、熱線の反射と紫
外線の吸収とをする層（単数、または複数）で覆うこと
もでき、これにて口金２の上記劣化を抑制できる。In the present invention, the surface of the base 2 receiving the light from the discharge lamp 3, ie, the outer diameter portion 10 and the inner diameter portion 1.
The inner and outer surfaces of the base 2 or the entire surface of the base 2 can be covered with a layer (single or plural) that reflects heat rays and absorbs ultraviolet rays, whereby the deterioration of the base 2 can be suppressed.
【００２４】図５は口金２と放電灯３との関係を断面図
で示している。口金２には、放電灯３の両端部から延び
るリードワイヤ９Ａがそれぞれ挿通されるように、内径
部１２の底部に貫通孔２４と、外径部１０の底部に貫通
孔２５をそれぞれ形成している。内径部１２内へ挿入さ
れた放電灯３の固定は、例えば内径部１２の外面からバ
ンド２６にて縛る方法や、放電灯３を口金２に接着する
方法等が採られる。FIG. 5 is a sectional view showing the relationship between the base 2 and the discharge lamp 3. The base 2 is formed with a through hole 24 at the bottom of the inner diameter portion 12 and a through hole 25 at the bottom of the outer diameter portion 10 so that lead wires 9A extending from both ends of the discharge lamp 3 are respectively inserted. I have. For fixing the discharge lamp 3 inserted into the inner diameter portion 12, for example, a method of binding the outer surface of the inner diameter portion 12 with a band 26 or a method of bonding the discharge lamp 3 to the base 2 are adopted.
【００２５】図６には、上記の各実施形態に示した発明
の何れかの放電灯装置１を設けた車両用前照灯の断面図
を示す。これは、ひとつの光源となる放電灯装置１を水
平軸Ｚ上に配置し、光源である放電灯装置１の放射光を
収束させるための放物線を基本とする反射鏡１６、走行
ビーム配光とすれ違いビーム配光とを切り換えるインナ
ーレンズ１７、インナーレンズ１７を支持軸に対して回
動させるための駆動装置（図示せず）、反射鏡１６から
反射された光を前方に透過するアウターレンズ１８から
構成されている。１９、２０は放電灯装置１を反射鏡１
６に取り付ける場合の位置決め用の切り欠きであり、反
射鏡１６の水平軸Ｚ上に形成した凹所に設けた突起に嵌
合する。凹所にフランジ１１を挿入したこの嵌合状態
で、板バネ２１などにて口金２をこの凹所に押し当て、
放電灯装置１を反射鏡１６に固定している。FIG. 6 is a sectional view of a vehicular headlamp provided with any one of the discharge lamp devices 1 according to the embodiments described above. This is because the discharge lamp device 1 serving as one light source is arranged on the horizontal axis Z, and the parabolic-based reflecting mirror 16 for converging the radiated light of the discharge lamp device 1 serving as the light source, the traveling beam distribution, and the like. An inner lens 17 for switching between the low beam distribution and a driving device (not shown) for rotating the inner lens 17 with respect to the support shaft; and an outer lens 18 for transmitting the light reflected from the reflecting mirror 16 forward. It is configured. 19 and 20 are the discharge lamp device 1 and the reflecting mirror 1
6, which is a notch for positioning when fitted to the projection 6, and is fitted to a projection provided in a recess formed on the horizontal axis Z of the reflecting mirror 16. In this fitted state where the flange 11 is inserted into the recess, the base 2 is pressed against the recess by a leaf spring 21 or the like,
The discharge lamp device 1 is fixed to a reflecting mirror 16.
【００２６】[0026]
【発明の効果】本発明の放電灯装置では、放電灯の外管
の根本部分にまで設けたブラックストライプによって、
発光管から合成樹脂製口金の放電灯挿入部へ照射される
光は遮られ、放電灯挿入部の劣化が抑制され、従来のよ
うな反射鏡への白化現象も抑制される。According to the discharge lamp device of the present invention, the black stripe provided up to the root portion of the outer tube of the discharge lamp is used.
Light emitted from the arc tube to the discharge lamp insertion portion of the synthetic resin base is blocked, deterioration of the discharge lamp insertion portion is suppressed, and the whitening phenomenon on the reflector as in the related art is also suppressed.
【００２７】また本発明の放電灯装置では、合成樹脂製
口金の内径部に設けた金属性の劣化防止用筒にて、発光
管から口金の内径部へ照射される光は遮られ、内径部の
劣化が抑制され、従来のような反射鏡への白化現象も抑
制される。Further, in the discharge lamp device of the present invention, the light emitted from the arc tube to the inner diameter of the base is blocked by the metallic deterioration preventing tube provided on the inner diameter of the base made of synthetic resin. Is suppressed, and the whitening phenomenon on the reflecting mirror as in the related art is also suppressed.
【００２８】更に本発明の放電灯装置では、合成樹脂製
口金の表面を紫外線吸収層で覆うことにて、発光管から
口金の表面へ照射される光から口金を保護し、口金が紫
外線によって劣化することが抑制され、この劣化による
放電灯周辺部への悪影響も抑制できる。Further, in the discharge lamp device of the present invention, by covering the surface of the synthetic resin base with an ultraviolet absorbing layer, the base is protected from light emitted from the arc tube to the surface of the base, and the base is deteriorated by ultraviolet rays. And the adverse effect on the periphery of the discharge lamp due to the deterioration can be suppressed.
【００２９】更に本発明の放電灯装置では、ブラックス
トライプと同様の作用をする遮光部と上記劣化防止用筒
とを一連の金属で構成することにて、放電灯から照射さ
れる光の配光範囲を規定することもできると共に、発光
管から合成樹脂製口金の内径部へ照射される光は遮ら
れ、内径部の劣化が抑制される。Further, in the discharge lamp device according to the present invention, the light-shielding portion having the same function as the black stripe and the deterioration prevention tube are formed of a series of metals, so that the light emitted from the discharge lamp is distributed. The range can be defined, and light emitted from the arc tube to the inner diameter portion of the synthetic resin base is blocked, and deterioration of the inner diameter portion is suppressed.
【００３０】更にまた、本発明の放電灯装置を具備する
自動車等の車両用前照灯にあっては、前照灯内の反射鏡
等への白化現象を抑制して、前照灯の反射効率の低下抑
制ができる。また反射鏡等への白化現象による配光特性
の変化も抑制できる。Further, in a headlamp for a vehicle such as an automobile equipped with the discharge lamp device of the present invention, the whitening phenomenon on a reflecting mirror or the like in the headlamp is suppressed, and the reflection of the headlamp is suppressed. A reduction in efficiency can be suppressed. In addition, a change in light distribution characteristics due to a whitening phenomenon on a reflecting mirror or the like can be suppressed.
【図１】 本発明の放電灯装置の第１の実施形態を示す
分解斜視図である。FIG. 1 is an exploded perspective view showing a first embodiment of a discharge lamp device of the present invention.
【図２】 本発明の放電灯装置の第２の実施形態を示す
分解斜視図である。FIG. 2 is an exploded perspective view showing a second embodiment of the discharge lamp device of the present invention.
【図３】 本発明の放電灯装置の第３の実施形態に係る
口金への紫外線吸収層の塗布状態を示す斜視図である。FIG. 3 is a perspective view showing a state in which an ultraviolet absorbing layer is applied to a base according to a third embodiment of the discharge lamp device of the present invention.
【図４】 本発明の放電灯装置の第３の実施形態を示す
分解斜視図である。FIG. 4 is an exploded perspective view showing a third embodiment of the discharge lamp device of the present invention.
【図５】 本発明の放電灯装置の口金と放電灯との関係
を示す断面図である。FIG. 5 is a sectional view showing a relationship between a base and a discharge lamp of the discharge lamp device of the present invention.
【図６】 本発明の放電灯装置を具備した車両用前照灯
の断面図である。FIG. 6 is a sectional view of a vehicle headlamp provided with the discharge lamp device of the present invention.
【図７】 先行技術の放電灯装置の分解斜視図である。FIG. 7 is an exploded perspective view of a prior art discharge lamp device.
【図８】 先行技術の放電灯装置の口金と放電灯との組
合わせ状態の斜視図である。FIG. 8 is a perspective view showing a combination state of a base and a discharge lamp of a discharge lamp device of the prior art.
【図９】 先行技術の放電灯装置の口金と放電灯との組
合わせ状態の側面図である。FIG. 9 is a side view of a state in which a base and a discharge lamp of a prior art discharge lamp device are combined.
【図１０】 先行技術の放電灯装置の口金の正面図であ
る。FIG. 10 is a front view of a base of a prior art discharge lamp device.
【図１１】 先行技術の発光管４の断面図である。FIG. 11 is a cross-sectional view of a prior art arc tube 4.
１……放電灯装置 ２……口金 ３……放電灯 ４……発光管 ５……外管 ６……放電空間 ７……電極 ９……リードワイヤ １０…外径部 １２…内径部 １５…ブラックストライプ ２２…劣化防止用筒 DESCRIPTION OF SYMBOLS 1 ... Discharge lamp apparatus 2 ... Base 3 ... Discharge lamp 4 ... Arc tube 5 ... Outer tube 6 ... Discharge space 7 ... Electrode 9 ... Lead wire 10 ... Outer diameter part 12 ... Inner diameter part 15 ... Black stripe 22: Deterioration prevention cylinder
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3K013 AA08 BA01 CA08 DA09 3K042 AA08 AB02 AC06 BB01 BC01 BD04 BE04 BE05 BE07 CC03 CC04 5C043 AA06 BB09 CC03 CD01 CD05 DD27 EA15 EA19 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K013 AA08 BA01 CA08 DA09 3K042 AA08 AB02 AC06 BB01 BC01 BD04 BE04 BE05 BE07 CC03 CC04 5C043 AA06 BB09 CC03 CD01 CD05 DD27 EA15 EA19
Claims (6)
電空間に一端を突出するように埋設された一対の電極を
有し前記電極への給電用のリードワイヤを両端部から延
出した発光管を外管で覆った放電灯と、前記リードワイ
ヤへ給電可能に前記放電管の一端部を挿入部に挿入支持
する合成樹脂製口金とからなる放電灯装置であって、前
記放電灯からの光の照射範囲を定めるよう前記外管に設
けた黒色の遮光部を前記口金に挿入される側の前記外管
の根本部分にまで形成し、前記発光管からの光による前
記挿入部の劣化抑制をすることを特徴とする放電灯装
置。1. A light emitting device having a discharge space inside a quartz glass tube and a pair of electrodes embedded so as to protrude one end into the discharge space, and a lead wire for supplying power to the electrodes extending from both ends. A discharge lamp device comprising a discharge lamp in which a tube is covered with an outer tube, and a synthetic resin base that inserts and supports one end of the discharge tube in an insertion portion so that power can be supplied to the lead wire. A black light-shielding portion provided on the outer tube so as to determine a light irradiation range is formed up to a root portion of the outer tube on a side to be inserted into the base, and deterioration of the insertion portion due to light from the arc tube is suppressed. A discharge lamp device.
電空間に一端を突出するように埋設された一対の電極を
有し前記電極への給電用のリードワイヤを両端部から延
出した発光管を外管で覆った放電灯と、前記リードワイ
ヤへ給電可能に前記放電管の一端部を挿入支持する内径
部を有した合成樹脂製口金とからなる放電灯装置であっ
て、前記内径部にはその内面を覆って前記発光管から前
記内径部へ照射される光を遮ぎる金属性の劣化防止用筒
を設けたことを特徴とする放電灯装置。2. A light emitting device having a discharge space inside a quartz glass tube and a pair of electrodes embedded so as to protrude one end into the discharge space, and a lead wire for supplying power to the electrodes extending from both ends. A discharge lamp device comprising a discharge lamp in which a tube is covered with an outer tube, and a synthetic resin base having an inner diameter portion that inserts and supports one end of the discharge tube so that power can be supplied to the lead wire. A discharge lamp device provided with a metal deterioration prevention tube which covers an inner surface thereof and blocks light emitted from the arc tube to the inner diameter portion.
電空間に一端を突出するように埋設された一対の電極を
有し前記電極への給電用のリードワイヤを両端部から延
出した発光管を外管で覆った放電灯と、前記リードワイ
ヤへ給電可能に前記放電管の一端部を挿入部に支持した
合成樹脂製口金とからなる放電灯装置であって、前記口
金の表面には前記発光管から前記口金へ照射される紫外
線を吸収する紫外線吸収層を設けたことを特徴とする放
電灯装置。3. A light emitting device having a discharge space inside a quartz glass tube and a pair of electrodes embedded so as to protrude one end into the discharge space, and a lead wire for feeding power to the electrodes extending from both ends. A discharge lamp device comprising a discharge lamp in which a tube is covered with an outer tube, and a synthetic resin base supporting one end of the discharge tube in an insertion portion so that power can be supplied to the lead wire, wherein a surface of the base is provided. A discharge lamp device comprising an ultraviolet absorbing layer for absorbing ultraviolet light emitted from the arc tube to the base.
電空間に一端を突出するように埋設された一対の電極を
有し前記電極への給電用のリードワイヤを両端部から延
出した発光管を外管で覆った放電灯と、前記リードワイ
ヤへ給電可能に前記放電管の一端部を内径部に挿入支持
した合成樹脂製口金とからなる放電灯装置であって、前
記内径部に挿入された前記外管の根本部分にまで塗布し
た黒色の遮光部、前記内径部の内面を覆う金属性の劣化
防止用筒、または前記口金の表面に設けた紫外線吸収層
の何れかまたはこれらの複数の組み合わせからなること
を特徴とする放電灯装置。4. A light emitting device having a discharge space inside a quartz glass tube and a pair of electrodes embedded so as to protrude one end into the discharge space, and a lead wire for supplying power to the electrodes extending from both ends. A discharge lamp device comprising a discharge lamp in which a tube is covered with an outer tube, and a synthetic resin base in which one end of the discharge tube is inserted and supported in an inner diameter portion so as to be able to supply power to the lead wire, and is inserted into the inner diameter portion. One or more of a black light-shielding portion applied to the root portion of the outer tube, a metallic deterioration preventing cylinder covering the inner surface of the inner diameter portion, or an ultraviolet absorbing layer provided on the surface of the base. A discharge lamp device comprising a combination of:
電空間に一端を突出するように埋設された一対の電極を
有し前記電極への給電用のリードワイヤを両端部から延
出した発光管を外管で覆った放電灯と、前記リードワイ
ヤへ給電可能に前記放電管の一端部を内径部に挿入支持
した合成樹脂製口金とからなる放電灯装置であって、前
記内径部に挿入された前記外管の根本部分を覆う黒色の
遮光部と、前記内径部の内面を覆うように設けた劣化防
止用筒とを一連の金属で構成したことを特徴とする放電
灯装置。5. A light emitting device having a discharge space inside a quartz glass tube and a pair of electrodes embedded so as to protrude one end into the discharge space, and a lead wire for supplying power to the electrodes extending from both ends. A discharge lamp device comprising a discharge lamp in which a tube is covered with an outer tube, and a synthetic resin base in which one end of the discharge tube is inserted and supported in an inner diameter portion so as to be able to supply power to the lead wire, and is inserted into the inner diameter portion. A discharge lamp device, wherein a black light-shielding portion covering a root portion of the outer tube and a deterioration prevention tube provided so as to cover an inner surface of the inner diameter portion are formed of a series of metals.
の放電灯装置を具備したことを特徴とする車両用前照
灯。6. A headlamp for a vehicle, comprising the discharge lamp device according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11195992A JP2001023427A (en) | 1999-07-09 | 1999-07-09 | Discharge lamp device and headlamp for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11195992A JP2001023427A (en) | 1999-07-09 | 1999-07-09 | Discharge lamp device and headlamp for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001023427A true JP2001023427A (en) | 2001-01-26 |
Family
ID=16350428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11195992A Pending JP2001023427A (en) | 1999-07-09 | 1999-07-09 | Discharge lamp device and headlamp for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001023427A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002319367A (en) * | 2001-04-20 | 2002-10-31 | Stanley Electric Co Ltd | Small-sized discharge lamp |
| GB2377546A (en) * | 2001-03-12 | 2003-01-15 | Koito Mfg Co Ltd | Discharge lamp device with ultraviolet shielding |
| JP2005129373A (en) * | 2003-10-24 | 2005-05-19 | Hitachi Lighting Ltd | Fluorescent lamp |
| GB2411518A (en) * | 2004-02-24 | 2005-08-31 | Osram Sylvania Inc | Reflector lamp having a reduced seal temperature |
| JP2007515747A (en) * | 2003-09-17 | 2007-06-14 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | High intensity discharge lamp |
| JP2007323986A (en) * | 2006-06-01 | 2007-12-13 | Harison Toshiba Lighting Corp | Discharge lamp and discharge lamp device |
| JP2015511385A (en) * | 2012-02-24 | 2015-04-16 | マトソン テクノロジー、インコーポレイテッド | Apparatus and method for generating electromagnetic radiation |
-
1999
- 1999-07-09 JP JP11195992A patent/JP2001023427A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2377546A (en) * | 2001-03-12 | 2003-01-15 | Koito Mfg Co Ltd | Discharge lamp device with ultraviolet shielding |
| GB2377546B (en) * | 2001-03-12 | 2004-12-15 | Koito Mfg Co Ltd | Discharge lamp device |
| US6894429B2 (en) | 2001-03-12 | 2005-05-17 | Koito Manufacturing Co., Ltd. | Discharge lamp device |
| JP4526204B2 (en) * | 2001-04-20 | 2010-08-18 | スタンレー電気株式会社 | Small discharge lamp |
| JP2002319367A (en) * | 2001-04-20 | 2002-10-31 | Stanley Electric Co Ltd | Small-sized discharge lamp |
| JP2007515747A (en) * | 2003-09-17 | 2007-06-14 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | High intensity discharge lamp |
| JP2005129373A (en) * | 2003-10-24 | 2005-05-19 | Hitachi Lighting Ltd | Fluorescent lamp |
| US7030543B2 (en) | 2004-02-24 | 2006-04-18 | Osram Sylvania Inc. | Reflector lamp having reduced seal temperature |
| GB2411518B (en) * | 2004-02-24 | 2007-10-03 | Osram Sylvania Inc | Reflector lamp having reduced seal temperature |
| GB2411518A (en) * | 2004-02-24 | 2005-08-31 | Osram Sylvania Inc | Reflector lamp having a reduced seal temperature |
| JP2007323986A (en) * | 2006-06-01 | 2007-12-13 | Harison Toshiba Lighting Corp | Discharge lamp and discharge lamp device |
| JP2015511385A (en) * | 2012-02-24 | 2015-04-16 | マトソン テクノロジー、インコーポレイテッド | Apparatus and method for generating electromagnetic radiation |
| KR101786769B1 (en) * | 2012-02-24 | 2017-10-18 | 맛선 테크놀러지, 인코포레이티드 | Apparatus and methods for generating electromagnetic radiation |
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